The Muffler,exhaust-Intake, cataloged under National Stock Number 2990-00-797-3323, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Cummins Power Generation Inc.. Government technical data includes 28 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-00-797-3323 |
| Primary Part Number | 155-0539 |
| Item Name | Muffler,exhaust-Intake |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Cummins Power Generation Inc. |
| Status | ACTIVE |
| Inlet Flange Shape | OVAL SINGLE INLET |
| Inlet Flange Shape | OVAL FIRST OUTLET |
| Operating Position | HORIZONTAL |
| Outlet Thread Size | 1-5/16-12 FIRST OUTLET |
| Outlet Connection Quantity | 1 |
| Inlet Location | LOCATED 13.500 IN.APART ON OD OF BODY IN |
| Coolant Type | AIR |
| Design Type | DRY |
| Overall Diameter | 3.000 INCHES NOMINAL IN |
| Outlet Thread Direction | RIGHT-HAND FIRST OUTLET |
| Center to Center Distance Between Mounting Holes | 2-114 IN.C TO G DIM OF MTG HOLES SINGLE INLET IN |
| Inlet Connection Quantity | 2 |
| Inlet Projection Length | 17.500 INCHES NOMINAL FIRST OUTLET IN |
| Inlet Projection Length | 17.500 INCHES NOMINAL SINGLE INLET IN |
| Outlet Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) FIRST OUTLET |
| Inlet Flange Mounting Hole Diameter | 0.375 INCHES NOMINAL FIRST OUTLET IN |
| Inlet Flange Mounting Hole Diameter | 0.375 INCHES NOMINAL SINGLE INLET IN |
| Muffler Design | BAFFLE |
| Thread Location | EXTERNAL FIRST OUTLET |
| Inlet Connection Type | FLANGE SINGLE INLET |
| Inlet Connection Type | FLANGE FIRST OUTLET |
| Body Shape | ROUND |
| Inlet Flange Mounting Provision and Quantity | 2 HOLES SINGLE INLET |
| Inlet Flange Mounting Provision and Quantity | 2 HOLES FIRST OUTLET |
| Unable to Decode | UNABLE TO DECODE |
| Surface Treatment | ALUMINUM |
| Material | STEEL |
| Outlet Projection Length | 1.000 INCHES NOMINAL FIRST OUTLET IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 155-0539 PRIMARY | Cummins Power Generation Inc. (USA) |
| Reference | Meaning |
|---|---|
| 155-539 | 5/9 Secondary reference Cummins Power Generation Inc. |
| 155C539 | 5/9 Secondary reference Cummins Power Generation Inc. |
NSN 2990-00-797-3323 is a Muffler,exhaust-Intake, manufactured by Cummins Power Generation Inc., classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-00-797-3323 has 1 manufacturer part number on file: 155-0539 (Cummins Power Generation Inc.).
Key specifications for 155-0539: Inlet Flange Shape: OVAL SINGLE INLET; Inlet Flange Shape: OVAL FIRST OUTLET; Operating Position: HORIZONTAL; Outlet Thread Size: 1-5/16-12 FIRST OUTLET. 28 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.